Add ability to specify dnsConfig in helm chart

[audip]

What this PR does / why we need it:
Changes:

• add ability to specify dnsConfig in helm chart for Deployment resource

This allows specifying dnsConfig block like mentioned in the kubernetes documentation

One example of what's in use at @myfitnesspal is

      dnsConfig:
        options:
        - name: ndots
          value: "2"
        - name: single-request-reopen
        - name: use-vc

screenshot of how the dns configuration is rendered on the deployment resource

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[k8s-ci-robot]

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[serathius]

/assign @stevehipwell

[stevehipwell]

Thanks for the PR @audip. I've added a comment to the change and could you also add the new chart input to the README.

[dashpole]

/triage accepted

[stevehipwell]

/label tide/merge-method-squash
/ok-to-test

[stevehipwell]

/retest

[stevehipwell]

/retest

[stevehipwell]

/retest

[stevehipwell]

/retest

[stevehipwell]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: audip, stevehipwell

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• charts/OWNERS [stevehipwell]

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